Cement compound and process for making the same.



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Be it known that LELI RoY a'citizen of the United States, residing at Lewiston, in the county of Androscoggin, and State of Maine, have invented certainnew and useful Improvements in Cement Compounds. and Processes for Making the Same, of

- which'the following is a ecification.

The invention relates a new andim proved cement compound and process of making the same.

The 'chief objects of the invention are toprovide a cement, which "can be produced at comparatively -low cost and one which can withstand eat heat and variations intemperature without cracking after'being set, the same being of an elastic character and possessed of great adhering qualities.

vMy improved cement is composed of-the followin ingredients; blue clai fine sharp sand, 5 a ash and alum. T e preferred proportions are substantially blue clay three parts, fine sharp sand nine parts and a very small percentage or trace of soda ash. and alum, the quantities of the different materials for a barrel of the cementweighing' three hundred pounds being blue clay seventy-five pounds, fine sharp sand two hundred and twenty-five pounds, soda ash two ounces and alum one ounce. These proportions as before intimated are preferred and have been found to give excellent results. i 1

In marufacturing the cement the following process is followed: The soda ash is dissolved in about a pint of water and this solution isboiled with the play for about two hours, the clay and the soda ash solution being placed 1n a receptacle with suflicient water to boil the same. After this boiling operation the necessary quantity of sand and a small percentage of alum is next added; the whole isthen thoroughly mixed, the mass being preferably placed in a mixing machine; it is then dried by being placed in a drier or by any other suitablemeans, and finally ground up and placed in bags ready for use. The purpose ofthe soda ash is chiefly to make the cement elastic and to increase its adhesive qualities During the preliminary Specification of Letters Patent. Application filed June 3, 1910. Serial No. 564,873.

boiling operation, the mass of clay becomes thoroughly saturated and treated with the soda ash solution.

The cement produced by this process while available as a cement for various pur poses 15 especially adapted and can be employed with particular advantage in furnaces or the like as a bed for the fire brick or to bind .and hold the same together and in place. When used as a bed for fire brick, the heat welds the cement and the brick together and as the heat increases or dimin: ishes the cement will expand or contract and not kcrack and become detached from the bric Patented Sept. 3, 1912.

The cement is elastic, j will thoroughly adhere to the brick when exposed to great heat, and in cooling off gets very hard.

- What I claim is: r

1. A cement consisting of the resultant product of the mixture of blue clay, sand, soda ash and alum.

2. A cement consisting of the resultant product of a mixture of substantially three parts clay, nine parts-fine sharp sand and a small percentage of soda ash and alum.

3. The process of manufacturing cement consisting in subjecting blue clay with a solution of soda ash toheat, next adding a quantity of fine sharp sand and a small percentage of alum, thoroughly mixing the mass, next drying, and finally comminuting.

4. The process of making cement consistmg 111 boillng clay with soda ash 1n water,

then addingthe necessary quantity of sand and alum, thoroughly mixing the mass, then.

drying, and finally comminuting. 5. The processor making cement consisting of boiling clay with soda ash in water to thoroughly saturate the clay' with the soda ash, independent of other material to be subsequently added, and after such boiling operation adding sand, mixing the mass and comminuting. I In testimon whereof I aflix my signature in presence 0 two witnesses.

ELI ROY. 

